This project is a Rails 3 app, which can be installed on your computer for development like so.
Install RVM, Ruby 1.9.2, and git.
copy the code to your computer: git clone git://github.com/schwabsauce/body.git (paste that line into the app called Terminal)
pick a database: mysql, sqlite, or postgres. create a file in config/database.yml to allow your app to connect to whichever db server you have installed.
bundle rake db:migrate rake db:seed rake spec
rails s
Now you can visit the app at localhost:3000/ and sign up. The data on your computer will be kept separate from the other instances of the app.